Congrats that you got your transaction confirmed. If you pay viabtc service which is 0.01btc and I don't have any idea why do anyone has to use it, you will get confirmation or money back. Another way is pushtx.btc.com and they can offer low fee sometimes but usually none of them worths to pay. Better to contract any serious miner and ask for confirmation in exchange of some money, I think they will do it more cheaply.
Consider this advice in future.
I tried pushTX and they want $6000 US dollars...CEX.IO sent me a transaction, which contains 137 inputs and 16 output @ 22 sat/B, with over 40,000 bites...
Do you know any miners whose could help me and make some extra money ? I paid confirmTX didn't work, waste of money and time so far...
ConfirmTX is proven scam, pushtx.btc.com isn't scam but even fake acceleraters can't be as worse as btc.com is.
You can contact Quickseller and macbook-air (try member search function) but macbook-air was active on september, so he doesn't visit this forum and is very inactive. Quickseller is online very often and has access on F2pool's transaction selector, so contact him:
https://bitcointalk.org/index.php?action=profile;u=358020